ID 原文 译文
53697 通常是将空时平面均匀离散为若干个网格来构造字典。 Usually, the space-time plane is uniformly dispersed in to several grids to construct the dictionary.
53698 然而,真实的杂波点往往不能落在预先离散的网格点上,此时会出现离网效应,导致 SR-STAP 的性能降低。 However, the real clutter points often cannot fall on the pre-discrete grid pointscalled off-grid, leading to the performance degradation of SR-STAP.
53699 本文针对此问题,提出了一种基于知识辅助的字典校正方法。 To solve this problem, this paper proposes a knowl edge-aided dictionary correction method.
53700 首先利用载机平台参数等先验知识均匀离散空间频率, Firstly, a priori knowledge such as the parameters of the carrier platform is usedto uniformly discretize the spatial frequencies.
53701 然后计算和修正多普勒频率,并根据先验知识修正空间频率, Then, the Doppler frequencies are calculated and corrected, and the spatialfrequencies are corrected according to the prior knowledge.
53702 最后利用修正后的空间频率和多普勒频率对应的空时导向矢量来构造超完备稀疏字典。 Finally, the space-time steering vectors corresponding to the revised spatial frequencies and Doppler frequencies are used to construct an overcomplete sparse dictionary.
53703 仿真结果表明,与传统字典构造算法相比,该字典校正方法有效克服了离网效应,改善了 STAP 的性能。 The simulation results show that, compared with the traditional dictionary construction algorithm, the proposed knowledge-aided dictionary correction method can effectively overcome the off-grid effect and improve the performance of STAP.
53704 在传统的协作非正交多址( CNOMA,Cooperative Non-orthogonal Multiple Access) 系统中,通常需要向弱用户分配更多的功率,分配给强用户的功率不超过总功率的一半。 In conventional cooperative non-orthogonal multiple access ( CNOMA) system, more power is allocated to weak users, and the power allocated to strong users is less than half of the total power.
53705 同时,强用户还需在协作阶段承担中继通信的任务。 Meanwhile, strong users need to act as re- lays in cooperative communication.
53706 上述功率分配方式必将给强用户带来一定的负担。 Above power allocation strategy will bring some burden to strong users.